Just FYI, I tried out Sanctuarys method, but there was one little glitch for me… when you get to the point of selecting the out edge, going to t he menu bar…select transform to sphere… Nothing happened. Even using shift, alt, S… nothing happened. But when I added the 1 (shift alt S 1) than it transformed perfect. Not sure if I did something wrong or some bug (I was using 2.65a official).
Like others have mentioned Sanctuary, you do such a real nice job of describing in a very clear way, some great methods… you ought to put together a PDF… “Sanctuary’s Incredibly Useful and Insightful Tips and Tricks”